Regal 53 SC Owner's Manual page 111

GALVANIC ISOLATOR
The purpose of the galvanic isolator is to isolate the
yacht's grounding system from the shorepower ground.
The galvanic isolator allows AC voltage to travel back to
the green ground wire at the marina power center in the
event a short exists on the boat. Also, the isolator blocks
any DC current from traveling on the green ground wire.
This eliminates the possibility of galvanic interaction
from other boats in the vicinity.
The green ground or "bonding wire" runs from the
yacht's shore power inlet or optional cord reel to the gal-
vanic isolator. From the output of the galvanic isolator it
runs to the AC ground buss located behind the AC main
control panel in the salon.
Since the galvanic isolator is not polarized either termi-
nal can be used as the inlet or output side for the green
grounding wire. See the illustration.
There is a fan located inside the isolator. If you ever hear
the fan running the isolator has failed. Disconnect the
shore power from the boat and check the system. Call
your closest Regal yacht dealer for more information.
Do not to store objects near the isolator that might in-
hibit air fl ow to the fan.
Note that the galvanic isolator is not needed and
therefore is not installed on vessels with the optional
ISO Boost Isolation Transformer.
As standard equipment a
60 amp (60 hertz) galvan-
ic isolator for domestic
use is connected in series
with the AC grounding
"green" wire. Overseas
yachts use a 30 amp (50
hertz) galvanic isolator.
Typical Isolator Wiring
59
Systems